High-pressure reciprocating compressor



March 3l, 1931.

C. SCHAER led April 27, 1928 :nh/EMDR: 1 @w @UVW EN.

- ATFURN aYs Patented Mar. 31, 1931 UNITED STATES PATENT OFFICE CHARLESSCI-IAER, F LANGENTHAL, SWITZERLAND, ASSIGNOR TO THE FIRM SULZER FRERESSOCIT ANONYME, OF WINTERTHUR, SWITZERLAND HIGH-PRESSURE RECIPROCATINGCOMPRESSOR.

Application led April 27, 1928, Serial No.

This invention relates to reciprocating` compressors working at veryhigh pressure and has for its object to provide an improved andsimplified construction of such compressors in which the stresses in thematerial of the cylinder are considerably reduced.

According to the present invention the compressor cylinder is formedintegral with its cover, and the cylinder bore terminates in a blindsubstantially hemispherical chamber in the cylinder head, the inlet andoutlet passages leading to this chamber being also formed in the head sothat the stresses in the material are reduced and the need for agastight joint between the cylinder and its cover is eliminated. i

One construction according to the invention is diagrammaticallyillustrated by way of example in the accompanying drawing in which thecompressor cylinder yis shown in cross-section.

In the construction illustrated in the drawing the cylinder 1 is formedintegral with its cover and encloses a narrow duct-like bore withinwhich reciprocates a piston 3 of the plunger type. The cylinder bore 2terminates in a blind substantially hemispherical chamber 5 with whichcommunicates an inlet passage 6 and an outlet passage 7, also formed inthe cylinder head. These pas sages respectively lead to the inlet valve8 and discharge valve 10 controlling the inlet and discharge pipes 9 and11 as shown. The passages 6 and 7 are disposed symmetrically withrespect to the axis ot the cylinder bore 2 and make an angle atherewith, which may,

for example, be one of 45.

The complete cylinder together with its integral cover is secured bymeans of studs l2 to the compressor frame 4.

With the construction according to the invention the safety of operationot the compressor is increased owing to the reduction in the stressesinthe material, since the very high stresses produced by the junction oftwo cylindrical hollow spaces, as is the case when a separate cylindercover is employed, are avoided.

It will be appreciated that the results obtained by means of theinvention are in no 273,266, and in Switzerland May 2, 1927.

way altered when the cylinder is provided with a liner of appropriateform.

I claim:

l. In a high pressure reciprocating compressor, the combination of acylinder block, a cylinder head formed integral with said block, saidblocl: having an axial bore terminating in a blind chamber ofsubstantially hemispherical shape, and an inlet valve and a dischargevalve in said cylinder head, said valves being connected to said chamberby means of relatively small passages extending radially from thehemispherical portion of the bore.

2. In a high pressure reciprocating compressor, the combination of acylinder block, a cylinder head formed integral with said block, saidblock having an axial bore terminating in a blind chamber ofsubstantially hemispherical shape, and an inlet valve and a dischargevalve in said cylinder head, said valves communicating with said chamberby means of relatively small passages extending radially from thehemispherical portion of the bore, said passageways being of enlargeddiameters adjacent the exterior of the cylinder block to provide seatsfor the valves.

3. In a high pressure reciprocatingvcompressor,the combination of acylinder block, a cylinder head formed integral with said block` saidblock having an axial bore terminating in a blind chamber ofsubstantially hemispherical shape, and an inlet valve and a dischargevalve in said cylinder` head, said valves communicating with saidchamber by means of relatively small passages extending radially fromthe hemispherical portion of the bore, the radius of said ports beingless than thethiclness of the surrounding wall portion.

4. In a high pressure reciprocating compressor, the combination of acylinder block, a cylinder head formed integral with said block, saidblock having an axial bore terminating in a blind chamber ofsubstantially hemispherical shape, and an inlet valve and a dischargevalve in said cylinder head, said valves communicationg with saidchamber by means of relatively small passages extend;

ing radially from the hemispherioal portion of the bore, said portsbeing of enlarged radius adjacent the exterior of Jche cylinder blockbut no radius throughout their length 5 exceeding the thickness of thesurrounding wall portion.

In testimony whereof I have aiixed my signature.

CHARLES SCHAER.

